I've also found these to be helpful: The Language and Grammar of Mathematics, from The Princeton Companion to Mathematics, by Timothy Gowers: http://press.prin

I've also found these to be helpful: The Language and Grammar of Mathematics, from The Princeton Companion to Mathematics, by Timothy Gowers: http://press.princeton.edu/chapters/gowers/gowers_I_2.pdf http://press.princeton.edu/chapters/gowers/gowers_I_2.pdf Reading Mathematics, by John Hamal Hubbard: http://www.math.cornell.edu/~hubbard/readingmath.pdf http://www.math.cornell.edu/~hubbard/readingmath.pdf